Game window freezes when going to desktop and won't tab back in (DisplayServer regression)

[Steveplays28]

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Godot version

v4.0.beta6.mono.official [7f8ecffa5]

System information

Windows 10

Issue description

Sometimes if I go to my desktop my game's window just freezes, I can't tab back into it.

Steps to reproduce

Go to your desktop using a graphical button or a keyboard shortcut (depends on your OS/DE), usually Win+D/Super+D. Try to tab back in, it won't work. The game window will not tab back in and reappear.

This isn't very consistent though, it only happens about 75% of the time. This has been reproduced by @lewiji using Linux w/ Nvidia, with a different project (Godot Engine Discord).

The Process monitor graph dips when this happens.

Minimal reproduction project

N/A